question is a bit unclear.
You’ve indicated this as a blueprint question. In blueprints, you use the print string, print text, or breakpoints. You also have the blueprint debugger tool.
If you want to format text you can use format text node. That can plug into a print string so that you can easily input variables and it will auto-convert them.
There is several plugins on the marketplace that open up a little more functionality for logs to blueprint, though it’s minor convenience stuff.
You can enter verbosity commands into the print nodes as well, such as Error : my message, Warning: my message, etc.